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INVENTORIES (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
INVENTORIES
Coal	$ 66,383	$ 23,553
Supplies (net of reserve for obsolescence)	62,557	53,773
Total inventories, net	128,940	77,326
Reserve for obsolescence	$ 7,456	$ 6,601

X

- Definition

Carrying amount as of the balance sheet date of coal, which is a combustible rock or minerals which are extracted from the ground and used as fuel.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
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No definition available.

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- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

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-Topic 852
-SubTopic 10
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- Definition

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of products used directly or indirectly in the manufacturing or production process, which may or may not become part of the final product. May also include items used in the storage, presentation or transportation of physical goods.

+ References

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- Definition

Amount of valuation reserve for inventory.

+ References

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